4MM CS X 63MM ID BLACK BUNA 70D

H4X63 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 63 mm (2.48 in), a cross section of 4 mm (0.157 in), and an outside diameter of 71 mm (2.8 in). In service, this o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, most widely specified general-purpose sealing elastomer. It resists many alcohols, greases and lubricants, and petroleum-based oils. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C). Verify compatibility before use with ozone and direct sunlight or ketones.

Maintenance and OEM teams specify it across hydraulic and pneumatic systems, general industrial maintenance, and agricultural equipment.

This item is sold individually under part number H4X63. Unit weight is approximately 3.2916 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.